%0 Journal Article
%A Beaumont, Simon
K.
%A Alayoglu, Selim
%A Specht, Colin
%A Michalak, William D.
%A Pushkarev, Vladimir
V.
%A Guo, Jinghua
%A Kruse, Norbert
%A Somorjai, Gabor A.
%D 2014
%T Combining
in Situ NEXAFS Spectroscopy and CO2 Methanation Kinetics
To Study Pt and Co Nanoparticle Catalysts Reveals
Key Insights into the Role of Platinum in Promoted Cobalt Catalysis
%U https://acs.figshare.com/articles/journal_contribution/Combining_in_Situ_NEXAFS_Spectroscopy_and_CO_sub_2_sub_Methanation_Kinetics_To_Study_Pt_and_Co_Nanoparticle_Catalysts_Reveals_Key_Insights_into_the_Role_of_Platinum_in_Promoted_Cobalt_Catalysis/2273980
%R 10.1021/ja505286j.s001
%2 https://ndownloader.figshare.com/files/3910000
%K cobalt hydrogenation catalysts
%K Co surface atom
%K Promoted Cobalt CatalysisThe
%K Co Nanoparticle Catalysts
%K CO 2 Methanation Kinetics
%K CO 2 methanation rate
%K CO 2 methanation
%K Pt NPs
%K Situ NEXAFS Spectroscopy
%K Co NP systems
%X The
mechanistic role of platinum and precious metals in promoting
cobalt hydrogenation catalysts of the type used in reactions such
as Fischer–Tropsch synthesis is highly debated. Here we use
well-defined monometallic Pt and Co nanoparticles (NPs) and CO2 methanation as a probe reaction to show that Pt NPs deposited
near Co NPs can enhance the CO2 methanation rate by up
to a factor of 6 per Co surface atom. In situ NEXAFS spectroscopy
of these same Pt NP plus Co NP systems in hydrogen shows that the
presence of nearby Pt NPs is able to significantly enhance reduction
of the Co at temperatures relevant to Fischer–Tropsch synthesis
and CO2 methanation. The mechanistic role of Pt in these
reactions is discussed in light of these findings.
%I ACS Publications